Collatz in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Gray Code Decoder Gray Code Encoder Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Gray Code Decoder Gray Code Encoder Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 321st annaproxy 912 78 112ms 13 Jan 2023 321st IanUtley 912 78 115ms 12 Nov 2023 321st GrayJoKing 🇦🇺 912 78 81ms 28 Nov 2023 324th Shanethegamer 🇺🇸 912 86 461ms 15 May 2023 324th JayXon 🇺🇸 912 86 481ms 15 May 2023 324th Steffan153 🇫🇮 912 86 460ms 16 May 2023 324th Lydxn 🇨🇦 912 86 456ms 16 May 2023 324th GrayJoKing 🇦🇺 912 86 461ms 11 Aug 2023 324th sean-niemann 🇺🇸 912 86 468ms 11 Jul 2024 330th Bubbler-4 911 33 2,528ms 6 May 2022 330th rak1507 🇬🇧 911 33 108ms 8 May 2022 330th ngn 🇧🇬 911 33 25ms 11 May 2022 330th zacjl 911 33 32ms 3 Jun 2025 330th GrayJoKing 🇦🇺 911 33 13ms 4 Jun 2025 330th HPWiz 🇳🇿 911 33 9ms 16 Nov 2025 336th Lydxn 🇨🇦 911 70 143ms 7 May 2022 336th JayXon 🇺🇸 911 70 143ms 7 May 2022 338th Steffan153 🇫🇮 911 71 110ms 14 Oct 2022 338th Shanethegamer 🇺🇸 911 71 119ms 15 Oct 2022 338th stefangimmillaro 911 71 111ms 16 Oct 2022 338th MeWhenI 🇻🇦 911 71 116ms 16 Oct 2022 342nd andersk 🇺🇸 911 91 139ms 25 Oct 2022 342nd Super-Pizza 🇨🇦 911 91 128ms 4 Dec 2022 342nd klixel 🇨🇦 911 91 126ms 20 May 2023 342nd lynn 911 91 128ms 6 Jul 2024 342nd edsrzf 🇳🇿 911 91 126ms 29 Nov 2024 342nd DialFrost 🇸🇬 911 91 133ms 7 Apr 2025 342nd elgan65536 🇺🇸 911 91 122ms 10 Feb 2026 342nd fantaize 911 91 123ms 10 Mar 2026 342nd snoozingnewt 🇨🇦 911 91 132ms 5 days ago 351st tailorspy 911 93 58ms 27 May 2024 351st sean-niemann 🇺🇸 911 93 61ms 9 Jun 2025 351st KasperKivimaeki 🇫🇮 911 93 56ms 26 Oct 2025 354th Lydxn 🇨🇦 910 47 257ms 5 May 2022 355th Lydxn 🇨🇦 910 81 39ms 1 Apr 2023 356th JayXon 🇺🇸 909 53 431ms 17 Aug 2024 357th Shanethegamer 🇺🇸 908 61 4ms 9 Oct 2023 358th nai62 908 68 7ms 27 Aug 2022 359th Steffan153 🇫🇮 908 73 68ms 26 Feb 2026 360th ovs-code 🇩🇪 908 75 67ms 12 Sep 2024 360th Kacarott 🇦🇺 908 75 62ms 13 Sep 2024 362nd sean-niemann 🇺🇸 907 54 148ms 6 Aug 2024 362nd Steffan153 🇫🇮 907 54 154ms 6 Aug 2024 362nd lukegustafson 🇺🇸 907 54 140ms 7 Aug 2024 362nd pardouin 🇫🇷 907 54 135ms 8 Aug 2024 362nd Lydxn 🇨🇦 907 54 142ms 9 Aug 2024 367th sean-niemann 🇺🇸 907 66 112ms 29 May 2025 368th lynn 907 78 1,231ms 5 May 2022 369th GrayJoKing 🇦🇺 905 71 321ms 10 Aug 2023 370th sean-niemann 🇺🇸 905 75 5ms 23 Dec 2025 370th Steffan153 🇫🇮 905 75 5ms 11 Feb 2026 372nd primo-ppcg 🇹🇭 905 93 32ms 7 May 2022 372nd AlephSquirrel 905 93 29ms 21 Jan 2023 372nd kg583 🇺🇸 905 93 32ms 26 Dec 2024 372nd CLOStrophobic 🇮🇹 905 93 43ms 17 Jan 2025 372nd edsrzf 🇳🇿 905 93 36ms 3 Jul 2025 377th JayXon 🇺🇸 905 105 360ms 4 Oct 2025 378th KrausRaus 🇺🇸 904 59 11ms 4 May 2022 378th voytxt 🇨🇿 904 59 12ms 4 May 2022 378th KingSkyrock 🇺🇸 904 59 13ms 18 May 2022 378th ZakkkkAttackkkk 🇵🇭 904 59 11ms 14 Jul 2022 378th aksyristos 904 59 15ms 28 Oct 2022 378th nstearns96 🇬🇧 904 59 12ms 28 Nov 2022 378th janbehrens 🇩🇪 904 59 14ms 17 May 2023 378th Shanethegamer 🇺🇸 904 59 10ms 25 May 2023 378th Maznek 904 59 13ms 26 Jun 2023 378th SpiritAxolotl 🇺🇸 904 59 12ms 20 Mar 2024 378th Andrey-Plotnikov 904 59 11ms 19 May 2024 378th emgordon154 904 59 10ms 5 Aug 2024 378th duckyluuk 🇳🇱 904 59 15ms 3 Oct 2024 378th lifthrasiir 🇰🇷 904 59 11ms 23 Nov 2024 378th fuzzylojik-golf 🇺🇸 904 59 12ms 1 Jun 2025 378th acollett89 904 59 12ms 17 Jun 2025 378th iczelia 🇩🇪 904 59 11ms 23 Sep 2025 378th Yax42 🇫🇷 904 59 11ms 20 Jan 2026 378th Protothor 904 59 11ms 13 days ago 397th edsrzf 🇳🇿 903 72 128ms 3 Jul 2025 398th Shanethegamer 🇺🇸 903 77 14ms 15 May 2023 399th marshallward 🇺🇸 903 83 40ms 10 May 2022 400th krcs 🇵🇱 903 86 380ms 10 May 2022 First Prev 321–400 of 3,643 Next Last